| Literature DB >> 12198486 |
Didier Nurizzo1, Johan P Turkenburg, Simon J Charnock, Shirley M Roberts, Eleanor J Dodson, Vincent A McKie, Edward J Taylor, Harry J Gilbert, Gideon J Davies.
Abstract
Cellvibrio japonicus arabinanase Arb43A hydrolyzes the alpha-1,5-linked L-arabinofuranoside backbone of plant cell wall arabinans. The three-dimensional structure of Arb43A, determined at 1.9 A resolution, reveals a five-bladed beta-propeller fold. Arb43A is the first enzyme known to display this topology. A long V-shaped surface groove, partially enclosed at one end, forms a single extended substrate-binding surface across the face of the propeller. Three carboxylates deep in the active site groove provide the general acid and base components for glycosidic bond hydrolysis with inversion of anomeric configuration.Entities:
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Year: 2002 PMID： 12198486 DOI： 10.1038/nsb835
Source DB: PubMed Journal: Nat Struct Biol ISSN： 1072-8368